diff --git a/src/librustc/back/link.rs b/src/librustc/back/link.rs
index 1c995662808..8794dae1178 100644
--- a/src/librustc/back/link.rs
+++ b/src/librustc/back/link.rs
@@ -153,9 +153,9 @@ pub mod jit {
                     code: entry,
                     env: ptr::null()
                 };
-                let func: &fn(++argv: ~[~str]) = cast::transmute(closure);
+                let func: &fn(++argv: ~[@~str]) = cast::transmute(closure);
 
-                func(~[/*bad*/copy sess.opts.binary]);
+                func(~[sess.opts.binary]);
             }
         }
     }
diff --git a/src/librustc/driver/driver.rs b/src/librustc/driver/driver.rs
index a804469ac65..44c092d8697 100644
--- a/src/librustc/driver/driver.rs
+++ b/src/librustc/driver/driver.rs
@@ -62,7 +62,7 @@ pub fn source_name(input: input) -> ~str {
     }
 }
 
-pub fn default_configuration(sess: Session, +argv0: ~str, input: input) ->
+pub fn default_configuration(sess: Session, argv0: @~str, input: input) ->
    ast::crate_cfg {
     let libc = match sess.targ_cfg.os {
       session::os_win32 => ~"msvcrt.dll",
@@ -101,7 +101,7 @@ pub fn default_configuration(sess: Session, +argv0: ~str, input: input) ->
          mk(@~"target_word_size", @wordsz),
          mk(@~"target_libc", @libc),
          // Build bindings.
-         mk(@~"build_compiler", @argv0),
+         mk(@~"build_compiler", argv0),
          mk(@~"build_input", @source_name(input))];
 }
 
@@ -114,7 +114,7 @@ pub fn append_configuration(+cfg: ast::crate_cfg, +name: ~str)
     }
 }
 
-pub fn build_configuration(sess: Session, +argv0: ~str, input: input) ->
+pub fn build_configuration(sess: Session, argv0: @~str, input: input) ->
    ast::crate_cfg {
     // Combine the configuration requested by the session (command line) with
     // some default and generated configuration items
@@ -523,7 +523,7 @@ pub fn host_triple() -> ~str {
         };
 }
 
-pub fn build_session_options(+binary: ~str,
+pub fn build_session_options(binary: @~str,
                              matches: &getopts::Matches,
                              demitter: diagnostic::Emitter)
                           -> @session::options {
diff --git a/src/librustc/driver/session.rs b/src/librustc/driver/session.rs
index aee5e01e091..6171ebd8610 100644
--- a/src/librustc/driver/session.rs
+++ b/src/librustc/driver/session.rs
@@ -131,7 +131,7 @@ pub struct options {
     // will be added to the crate AST node.  This should not be used for
     // anything except building the full crate config prior to parsing.
     cfg: ast::crate_cfg,
-    binary: ~str,
+    binary: @~str,
     test: bool,
     parse_only: bool,
     no_trans: bool,
@@ -303,7 +303,7 @@ pub fn basic_options() -> @options {
         maybe_sysroot: None,
         target_triple: host_triple(),
         cfg: ~[],
-        binary: ~"rustc",
+        binary: @~"rustc",
         test: false,
         parse_only: false,
         no_trans: false,
diff --git a/src/librustc/rustc.rc b/src/librustc/rustc.rc
index 3fbe1b96ef7..67f71682d32 100644
--- a/src/librustc/rustc.rc
+++ b/src/librustc/rustc.rc
@@ -206,9 +206,9 @@ pub fn run_compiler(args: &~[~str], demitter: diagnostic::Emitter) {
     ::core::logging::console_off();
 
     let mut args = /*bad*/copy *args;
-    let binary = args.shift();
+    let binary = @args.shift();
 
-    if args.is_empty() { usage(binary); return; }
+    if args.is_empty() { usage(*binary); return; }
 
     let matches =
         &match getopts::groups::getopts(args, optgroups()) {
@@ -219,7 +219,7 @@ pub fn run_compiler(args: &~[~str], demitter: diagnostic::Emitter) {
         };
 
     if opt_present(matches, ~"h") || opt_present(matches, ~"help") {
-        usage(binary);
+        usage(*binary);
         return;
     }
 
@@ -236,7 +236,7 @@ pub fn run_compiler(args: &~[~str], demitter: diagnostic::Emitter) {
     }
 
     if opt_present(matches, ~"v") || opt_present(matches, ~"version") {
-        version(binary);
+        version(*binary);
         return;
     }
     let input = match vec::len(matches.free) {
@@ -253,8 +253,7 @@ pub fn run_compiler(args: &~[~str], demitter: diagnostic::Emitter) {
       _ => early_error(demitter, ~"multiple input filenames provided")
     };
 
-    // XXX: Bad copy.
-    let sopts = build_session_options(copy binary, matches, demitter);
+    let sopts = build_session_options(binary, matches, demitter);
     let sess = build_session(sopts, demitter);
     let odir = getopts::opt_maybe_str(matches, ~"out-dir");
     let odir = odir.map(|o| Path(*o));